Electric terminal.



J. CUTHBERT.

ELECTRIC T ERMINAL'. APPucATmN FILED AuG.5. 191s.

Patented July 10, 1917'.v

. crystallizin JOHN GUTHBERT, OF CHICAGO, ILLINOIS.

ELECTRIC TERMINAL.

Specication of Letters Patent.

Patented Jury io, iai t..

Application led August 5, 1916. Serial No. 113,361.

To all whom t may concern:

Be it known that I, JOHN CUTHBERT, a citizen ofthe United States,residing at Chicago, in the county of Cook and State of lllinois, haveinvented certain new and useful Improvements in Electric Terminals, ofwhich the following is a specification.

My invention relates to improvements in electric terminals.

@ne of the objects of my invention is to provide. a wire, or cableterminal device which will coil and clamp the wire or cable, hold thethreaded clamping members to prevent loosening, and which will engagethe rubber covering of the conductor thus relieving the wire proper ofthe destructive eects which results from intense vibratlon to which suchconductors are subjected when used on automobile chassisA or in likesituations.

Other and further objects of my invention will be apparent to personsskilled in the art from the following speciiication when` taken inconjunction with the accompanying drawings, wherein:

Figure 1 is an elevation of the device showing a part in section, andthe wire cable in-v Serted prior to coiling it around the threaded studand clamping it.

Fig. 2 is an elevation of the device show- 'ing the cable coiled andclamped.

Fig. 3 is a section taken on line 3--3 of Fig. 2.

ig. 4 is a section taken on line-4-4 of Fig. 2. l

Fig. 5 is a section taken. on line 5-5 of Fig. 2, showing the bottomsurface of thev clamping nut.

Fig. 6 is a perspective view of said nut. lFig. 7 is a perspective viewof the cable terminal.

In all the views the saine reference characters are employed torepresent similar parts. In the drawings 10 is a base or plate ofinsulating material on which it is desirable `to attach or mount anelectric circuit terminal to which conducting cables or wires mayconveniently and firmly be connected. 'An orice 11 is made through theplate at the location where the terminal is to be placed. A screw 12extends through the orifice with its shank 13, projecting therebeyond toprovide a threaded stud for the nuts 14 and 15 which serve as clampingabutments for the wire. A conducting plate or strip 16, fer

connecting the terminal with the instrument or other device that may bemounted on the plate 10 is preferably provided with` an integrallaterally-deflected part 17 which' is inserted in the perforation 11 andhas threaded engagement with the threaded stud 13, and which holds thescrew in place, should the nuts 14 and 15 both be removed. While thisfeature of the device is preferred it is not a necessary part of myinvention.l The nut 14 is now screwed on the stud 13 into contact withthe plate or strip 16 and serves as a check nut to prevent the screw 12from loosening.

A wire or cable 18, having a-covering of insulating material 19, such asrubber, or the llikehas the covering removed from its end, as at 20, toprovide a bare part 20 for connection with the clamping device.

rIhe wire terminal 21 consists of a peculiar shaped washerto be includedbetween the nuts 14 and 15. It is provided with a flat part 22perforated, as at 23, for the stud 13 and as at 24 for the conductor end20. The opening 24 has an-area greater than the cross sectional area ofthe wire and extends from a region within the boundary of the clampingabutment to a point outside the boundary of the abutment. Preferably theopening is in the form of a slot with its major axis inclined in thedirection of nut rotation. The down-turned edges 25 and 26' encompassadjacent facets or angularly disposed side surfaces of the nut 14 toprevent the latter from turning upon the stud 13. The projecting,arcuate end 27 is provided with two down-turned lips 28 and 29 forengagement with the rubber covering 19 whereby to relieve the wire orcable 18 of undue vibration.

rlhe threaded nut 15 is providedwith one or more downwardly directedprojections 30, 30', two being shownin the drawings, to engage the endA2O of the wire 18 to coil it around the stud 13 prior to' being clampedby the nut.

The use and operation of the device is as follows: y

The conducting strip 16 is placed in position with the threadedcylindrical part 17 in the perforation 11. The screw is now screwed intothe part 17 until the parts are tightly held in the plate 10. The nut14is then placed in position and serves as a check nut. The wire-terminal22 is nowthreaded over the stud 13, the latter being placed in theperforation 23, with the down-turned edges A25 and 26 overlyingadjoining facets of the nutV 14. `The insulation 19 is removed from thewire cable 18, at its end, as at 20, which bare end is then passedthrough the perforation 24 until the edge of the covering 19 is liushwith the inside edges of the lips 28 and 29. The lips are then pinchedinto contact with the insulation` with pliers, until the lips with thearcuate part of the projection 27 form a cylinder closely engaging thewire covering. This holds the conductor in place by contact with thewire or cable covering, thus relieving the conductor of the effectsproduced by severe vibration.

The nut 15 is now placed on the stud 13 and turned until the end 20 ofthe conductor is included between the'projections 30, 30', whereupon:further turning of the nut 15 will coil the conductor (wire or cable)Varound the stud 13 and finally clamp the eye thus formed between thenut 15 and the wire terminal 22. When the eye is irmly clamped the nut15 is prevented from becoming loose by turning backward on the stud 13,by contact of one of the projections 30 with that part of the wire 18that is radially disposed, as shown in Figs.'2 and 3.

The strip 16. and part 17 are not essentially necessary to be used inthe practice of my invention as other means for connection with thescrew 12 may 'be'used instead of thisrefinement. r

Having described my invention, what I claim as new and useful, and vforwhich I desire to secure Letters Patent is:

1. An electrical conductor terminal for association with a wire and astud having a clamping abutment thereon; said terminal comprislng aplate portion having an opening to receive `the stud, and a wirereceiving opening of an area greater than the cross sectional area ofthe wire, the latter opening extending from. al region within theboundary of the clamping abutment to a point outside the boundary of theabutment.

2. vA11 electrical conductor terminal for ,association with a wire and astud-having a clamping nut thereon; said terminal comprising a plateportion having an opening to receive the stud, and a wire receiving slotof an area greater than the cross sectional areavof the wire, the slotextending from a region within the boundary of the 'clamping nut to apoint outside the boundary of the nut, the major axis of the slot beinginclined to one side of stud receiving opening in the direction of nutrotation.

3. An electrical conductor terminal .for association with a wire-and astud havlng va clamping nut thereon; said terminal comprising aplateportion having an opening to receive the stud, and a wire receiving slotOf lan area greater than the cross sectional area of the wire, the saidslot extending from a region within the boundary of the clamping nut toa point outside the boundary of the nut, its major axis bein inclined toone side of the stud receiving opening in the direction of nut rotation,and wire encircling lips projecting from the plate at points outside theportion in which the wire receiving opening is positioned.

L1.An electrical conductor terminal for association with a -wire and astud having a clamping abutment and a nut thereon; said terminalcomprising a plate portion having an opening to receive the stud and awire receiving slot of an area greater than the cross sectional area ofthe wire, the slot extending from a region within the boundary of thenut to a point without the boundary of the nut, its major axis beinginclined to one side of the stud receiving opening in the direction ofnut rotation, a projectionfrom said plate for engagement with a side ofthe clamping abutment to prevent relative rotation, and wire encirclingli s projecting from the plate to points outsi e the portion in whichthe wire receiving opening 1s positioned.

5. A wire terminal and binding device comprising a threaded stud; a wireterminal erforated for said stud and having a peroration through whichtothread a wire to hold it near the stud and a threaded nut on said studhaving wire to coil it around the stud.

6. A wire terminal and clampin device comprising a threaded stud; a wireolding terminal perforated and surrounding the stud and having anotherperforatlon throu h which to thread a wire to hold it near t e stud andabove said terminal, and a threaded nut on said stud having a shoulderto en age the wire and coil it around said stud to orm an eye andsubsequently to clamp said eye between said nut and terminal.

7 A wire terminal and binding device comprising a stud, a wire terminalperforated to receive the stud and havin a perforation through which tothread t e wire to `hold it near the stud, a wire clamping member onsaid stud, and means on said member for engaging the wire to coil itaround the stud.

8. A wire terminal and binding device comprising a stud, a wire terminalhaving anopening to receive the stud, and having a wire receivingopening of an area greater than thecross sectional area 'of the wire, awire clamping member on said stud and means on said member for engagingthe wire.to\fcoil it around the stud, the wire receiving openin in theterminal extending from adjacent tghe stud to a point outside of theboundary of said member.

a shoulder to engage the tace a distance less than the diameter of thewire tobe clamped and spaced apart from its axial perforation to providea shoulder to engage the Wire to coil it around the axis of the nut.

10. An electrical conductor terminal for association with a Wire and astud having a clamping abutment thereon; said terminal comprising aplate portion to underlie the clamping abutment and having a Wirereceiving opening extending from the region Within the boundary of theclamping abutment to a point outside the boundary of the abutment.

1l. A wire terminal and binding device comprising a stud, a Wireterminal for engagement with the stud and having a perforation throughwhich to thread the Wire to hold it near the stud, a wire clampingmember on said stud, and means on Said member for engaging the Wire tocoil it around the stud.

l2. A wire terminal and binding device comprising a stud, a Wireterminal for engagement With the stud, and having a wire receivingopening of an area greater than the cross sectional area of the Wire, aWire clamping member on said stud, and means on said member for engagingthe Wire to coil it around thc stud, the Wire receiving opening in theterminal extending from adjacent the stu'd to a point outside theboundary of said member.

In testimony whereof l hereunto set my hand in the presence of twosubscribing Witnesse's.

J CHN CUTHBERT. In the presence of- STANLEY W. 000K, MARY F. ALLEN.

